Side bearing for cars



v.1. Bumw.v

SIDE BEARING FOR 'CARS. APPLICATION FILED OCT. 24, um.

Patented June 29, 1920.

FIG. 2

INVENTOV a full, clear, and exact (l6S( hasten status VENCENT J. 0E CHIUAGQ, CGIMEPANY, 6F CHICAGO,

PATENT OFFICE.

SI .32 BEARING- FOR CARS.

Application filed @ctober 2s, 1817.

To all 'Zt'J/l/(T/N- it may concern Be it known that I. Vinonivr d. Bunny, a citizen of the United States, and resident of Chicago, in the county of Cook and State of lllinois, have invented a new and useiful in provement in Side Bearings "for Cars; and I do l'iereby declare the following to be iption thereof.

My invention relates to side bearings for railway cars, and has for one of its principal objects the provision of means whereby the anti-friction member cannot he accidentally disengaged from its bearing housing when it is relieved of the. wei ht of the car body. A further object is to provide a side hearing that will provide for free rolling travel under normal conditions and a sliding;' travel under abnormal, while, at the same time, certain guiding i'lllillllOllS of the anti-friction member or roller will be relieved of .shearin; strains when the limit of rolling movement of the roller is reached.

The construction is such also that should the body bearing move a greater distance than the limit oi. travel of the rolling member, and thus cause a hat spot on the roller, this would not be. objectionable with my construction as it is evident that the roller will. not make a complete revolution; therefore, a flat spotat such point on its circumference would never come in contact with the rolling face of said roller housing, and would not aili'ect the normal rolling action of the roller.

The invention comprises, broadly, therefore, means for accon'iplishing these several purposes. 7

In the accompanying drawings, Figure 1 is a sectional view of my improved. bearing showinp the roller in normal position in full lines. and its limited movement in either direction in dotted lines: l i e'. is a. plan view oi the part shown in Fl 1; and Fig. 3 a vertical section on the line I:ll. his. 2.

in the drawings. l. indicates a housing having a lower bearing-plate said housing havinp guides 3 formed on its opposite side walls. which project inwardly from the side walls 4: of the housing. llithin this housing is mounted an anti-friction member or roller which is indicated in Figs. 1 and 3, and is of more or less skeleton construction above. its center axis. and is of solid construction below said axis so that normally it tends to assume a position with the solid portion Specification of Letters Patent.

Patented June 29, 1920.

seriaino. 198,255.

below the axis. This roller, preferably, on each side of the solid portion, is provided with lugs or trunnions 6, which, when the roller is in normal centered position, as shown in Fig. 1, contact with the surfaces of the guide members 3 at the points 7- 7. The guide members 3 above these contact points are cut away slightly so that when the roller moves toward either end of the housing 1, the lugs on the side of the roller opposite the direction of movement moves away from the guide members as indicated at the upper dotted-line position of one of these lugs 6, I? in. 1; thus both the guide member and the lugs are relieved of contact, thus permitting the roller to roll free from limited movement to normal position in either direction. The lugs, however, n the side of the roller corresponding to its direction of movement follow down the guiding surfaces of the guide members, remainiimg in contact therewith whereby the roller is constantly controlled in its rolling movement and is prevented from direct rectilineal shifting movement without rotation. The end walls of the housing are curved as at 8 to conform to the shape of the roller, and are so positioned that the face of the roller contacts with either of these end walls just as the lug 6 reaches the lowermost position of the guide member 3 where the curve of these guide members joins the curve of the end walls 8.

in order to prevent the shearing oil of the lugs or trunnions 6 when the roller reaches either limit of its movement, these lugs or trunnions are so positioned that the face of the roller 5 will engage the curved end walls 8 of the housing just as, or slightly before, the lugs reach the lower portion ot' these curved end. walls; therefore, when. the roller is at either limit of its rollingmovement. further movement thereof is taken up and prevented by the end walls 8, and the lugs 6 are relieved oi any holding); strain tending to prevent turther rolling of the roller.

If the rollers in abnormal condition reach the end walls 8 somewhat before the upper bearinp plate 9 has reached the limit of its swiveling: or shitting movement. whereupon said upper bearing plate will slide upon the roller 5 durinp iurther movement, and if any flattening ot the roller should occur by such sliding movement, that will not allect LOO ni fle 40 mud for 01 gander; and

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